Improvement in molding-machines



v 2SheetsSheet 1.

L.-HO USTON.

MOLDING-MACHINE.

Patentefi Dec. 14,1875.

Him

2 Sheets-Sheet 2.

L. HOUSTON.

MOLDING-MACHINE. No.171,134. Pate nted ne.14,1875.'

- UNITED STATES LEVI HOUSTON, OF MONTGOMERY, PENNSYLVANIA.

IMPRQ VEMENT IN MOLDING-MACHINES.

Specification forming part of Letters Patent'No. 171,134, dated December14, 1875; application filed November 24, 1874.

ing-Machines, of which the following is a specification The object of myinvention is to so construct. a molding-machine that it will be moreeffective in its operation than those in common use and this object Iattain in the manner which I will now proceed to describe, referencebeing had to the accompanying drawings, in which- Figure 1, Sheet 1, isa front view of the machine; Fig. 2, a plan view; Fig. 3, Sheet 2, arear view; Fig. 4:, an end view; and Figs. 5 and 6, Sheet 1, perspectiveviews of parts of the machine.

A A are the side frames of the machine, and are suitably connectedtogether. The horizontal cutter a is secured to a shaft, 0 which turnsin bearings formed in a headstock, B, so secured to the opposite sideframes of the machine as to be adjustable thereon, and the outer end ofthis shaft is adapted to a bearing,a in the upper end of a curved' armor standard, D, secured to the side frame A at the base, and extendingoutside of the work-table E, which is also secured to the said frame. Ahearing in the side of this table carries the shaft of the lowerfeed-roller F,

which receives its motion, through the me-.

dium of bevel-wheels .c and c, from the vertical shaft H, driven by themain shaft I. The upper feedrollers b and 12 turn in suitable bearingsin the frame A, and are of different diameters, for a purpose explainedhereafter. These rollers b and I) receive their motion, through themedium of cog-wheels f and f from a cog-wheel, f, on a shaft, 0, which.is provided near its outer end with a pulley, d, for receiving a beltfrom a pulley, cl, on a shaft, 6, the latter receiving its motion fromthe driving-shaft. The shaft 6' turns in hearings on the frame-work ofthe machine, and is connected by a rigid bar, 9, to the shaft 0, theobject of which is to prevent the belt from drawing the shafts out'ofline. On referring to Fig. 1 it will be seen that the upper surface ofthe work-table E is slightly depressed at and near its outer end belowthe level of the rest of the table. This depression extends to about thecenter of the-lower feed-roller F, and its object is to prevent thatexcessive friction in front of the feed-rolls which is caused by thecontact of the work with the surface of the in relation to thecutting-edges of the cutterhead J as to support the work close up to theedge of the cutter, and prevent the chipping or splintering of the same,without regard to the size of the cutter-head which is employed. Withsome classes of work it is necessary to employ an intermediate cutterfor operating on the work in its passage from the horizontal Y cutter ato the inner cutter J, and one feature of my invention relates to auniversal hearing for such a cutter-head, and is illustrated in Figs. 1,2, 4, and 5 of the drawings.

The table E has an extension, at, and from this extension to the sideframe A project two guides, 0 0, (see Figs. 4 and 5,) to which isadapted the sliding block 19, carrying a vertical sliding framen'. Tohearings on this frame is adapted the shaft 8, which carries theintermediate cutter-head. Set screws are so combined with the slidingblock p and frame 7' that the cutter can be secured in any position,either vertical or horizontal, to which it maybe adjusted, andprovisionfor diagonal adjustment is provided by means of a curved slot, 23, inthe sliding block 19, to which is adapted-a set screw, 1;, secured tothe sliding frame '1". It will be seen on reference to Figs. 1 and 2that the bearings s of the shaft 8 are formed in one piece with thesliding frame 1', each been in g being provided with a sliding block, 2,adjustable by means of a set-screw. By this means the strain of theshaft 8 is resisted by a solid backing, the wear of the bean ing beingcompensated for by adjusting the sliding block 2.

Another feature of my invention is shown in the perspective view, Fig. 6and consists in forming two sides, y, .of the cutter-head plain, the tworemaining sides, 7 being slotted in the usual manner. The object of thiscon PATENT QFFIGE.

struction is to afford a firm backing for the cutting-plates so, whenheavy work is being performed by the machine, the cutting-plates being,in such case, secured to the solid face of the cutter.

On referring to Fig. 1, it will be seen that the upper feed-rollers b bare-of different diameters, the two being so geared, however,

ter-shaft, but serving also to support the worktable E at a pointimmediately beneath the cutter, where the table is in most need of asubstantial support.

The bearing a is adapted to a dovetailed groove formed in the upperportion of the frame D, so that it can be readily detached when achangeof cutter-heads becomes neces sary. I

I claim as my invention- 1. The combination, in a molding-machine,

of the vertically-adjus'table Work-table E and the standard D, securedto the frame below the table, and provided at the top with a hearing forthe spindle of the outside cutter-head, as set forth.

2. The work-table E, of a uniform height at both sides of the cutter,and depressed at and near one end, as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

LEVI HOUSTON. Witnesses:

WM. SEDAM,

WM. MAGKEI;

